Spring device for spring-pressed buttons.



H. WALDES.

PRING DEVICE FOR SPRING PRESSED BUTTONS.

APPLICATION FILED APE. 23, 1913.

Pam-med Jan. 13, 19M.

p'nirnnsrnrns PATENT ormcn.

HEINRICH WALDES, orwnseHowIr-z. NEAR. riparian, tv maavmimj Specification of Letters Patent.

' SPRING nnvren res sPR-ING-rREssED Burrows.

Patented Jan. 13,1914.

Application filed April 28. 1913. Serial No. 763,017.

To all 20710722 it may concern:

Be it known that I, Hammers \VaLons, a c'itlzen of the Austro-Hungarian Empire,

and residing at Vrschowitz, near Prague, -Bohem1a, Austro-Hungarian Empire, have invented a certain new andmseful Improved fastener and passes through slots in the hood into recesses in the neck of the button of the stud member and holds the parts together when the fastener is closed. Hitherto the hood has been provided with diametrically opposite straight slots, in which straight shanks of the two ends of the spring were situated, which engaged recesses in the neck of the button when the parts'were closed.

- The object of the present invention is to provide means by which the engaging parts of the spring are enabled to penetrate deeper recesses in the neck of the button.

Figure 1 of the accompanying drawings represents a vertical diametrica]. section on line 11 of Fig. 2 of a separable fastener showing one form of this invention. Fig. 2 represents a horizontal section thereof. Fig. 3 represents a horizontal section of the button head, showing the locking slot thereof constituting a p'art of this improvement indicated by the curved lines 3 and the old form of such slots by the straight dotted lines '6.

The same reference letters indicate corresponding. parts in the different figures.

In the form of this invention herein illustrated the spring member comprises the usual. approximately semi-circular connecting shank f disposed at the outer rim of the attaching plate 0 of the hood member and has at its opposite ends two. springs integral therewith opposite each other at opposite sides of the hood 0 of said hood member 0.

Each'of these springs is in the form of a double loop, the sides f and f of which are arc-shaped and concentric or approximately The side f is in the form of an elongated bend which projects through the slot .cZ in the side of the hood 6" and engages the arc-shaped recess 6 in the sides of the stud b of the stud or button member. The stud b of the stud member is providedon its opposite sides with recesses b which curve inwardly and afford wide bearings for the engagement of the spring. The slots (5 of the hood 0 are curvedat their ends to correspond with the curvature of the recesses of the stud. By means of this arrangement the engagement of the springs f projecting through the slots (5 of the hood 0 and entering into the recesses b in the stud b, is yery considerably increased without enlargmg said slots or weakening the hood. This arc-shaped projecting form of the springs is embodied in'a spring member of this character preferably by means of the double loophaving arc-shaped sides.

In Fig. 3 the curved lines f indicate the depths of the locking recesses in the button head and the dotted straight lines 6 indicate the old form of such recesses, these lines in-' dicating the relative depths of the new looking recesses and the shallowness of the old construction.

I claim as my invention 1. A separable fastener comprising a stud member including an attaching plate and a stud thereon provided with concave recesses on opposite sides, a socket member including an attaching plate and a hood provided on its opposite sides with slots adapted to register with said recesses, and arc-shaped springs on opposite sides ber adapted to engage said arc-shaped re cesses of the button members.

2. A separable fastener comprising a stud member including an attaching plate and a stud thereon provided with concave recesses on opposite sides, a socket member including an attaching plate and a hood provided on its opposite sides with slots adapted to regof said hood memister with snid ecesses, and a spring member including an arc-shaped connecting shank disposed on the attaching plate of the hood member and lining atits oppesite ends on opposite sides of said plate springs integral 'ith said connecting shank, each spring being in the form of a double loop, the sides of WhlCh are arc-shaped and con,-

' HEINRICH WVALDES.

Witnesses:

ARTHUR SCHWEINBURG, HYNE-K PERC. 

